| Standard label: | Restructuring and Related Costs [Table Text Block] |
| Name: | us-gaap:ScheduleOfRestructuringAndRelatedCostsTextBlock |
| Documentation: | Tabular disclosure of costs incurred for restructuring including, but not limited to, exit and disposal activities, remediation, implementation, integration, asset impairment, and charges against earnings from the write-down of assets. |
| Object type: | cm:Level3TextBlock |
| Data type: | Text Block (HTML) (nonnum:textBlockItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:ScheduleOfRestructuringAndRelatedCostsTextBlock |
| Examples of this text block disclosure: | RestructuringCostAndReserveHierarchy |
| Label | Role | Language |
| Restructuring and Related Costs [Table Text Block] | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 420 10 S99 1 (SAB TOPIC 5.P.3) | http://fasb.org/us-gaap/role/ref/legacyRef | 420 |
| FASB Accounting Standards Codification 420 10 50 1 | http://fasb.org/us-gaap/role/ref/legacyRef | 420 |
| FASB Accounting Standards Codification 420 10 S99 2 (SAB TOPIC 5.P.4) | http://fasb.org/us-gaap/role/ref/legacyRef | 420 |